<div class="row header">
  <div class="col-sm-4 top">
    <img src="assets/images/logo_03.png" class="logo pull-left">
  </div>
  <div class="col-sm-8 top">

    <ul class="nav navbar-nav">
      <li class="active"><a ng-href="#">学习指导</a></li>
      <li><a ng-href="#">教师介绍</a></li>
      <li><a ng-href="#">课程学习</a></li>
      <li><a ng-href="#">参考资料</a></li>
    </ul>
  </div>
</div>
